occult gastrointestinal bleeding

基本解释

You should send it to do black stool occult blood test, such as occult blood positive, that upper gastrointestinal bleeding, it should be consistent with a water wash corrosive link.
你應該送黑便做大便隱血試騐，如隱血陽性，說明上消化道出血，那就應與洗甲水的腐蝕性聯系起來。
Barium radiographs of the upper and lower gastrointestinal tract have limited utility in the setting of occult bleeding because of their inability to biopsy or treat lesions that are identified.
影像學鋇的上部和下部胃腸道衹有有限的實用背景神秘流血，因爲他們無法治療病變活檢或所認同。